Fixed #1 - Fixed the whatsnew-** script for loading release notes into builds

Added test to ensure that release notes are parsed properly
Updated to latest dependencies to fix security vulnerability
Updated GH Actions Workflow to run test before updating tag
Updated README.md to reflect proper whatsnew documentation.

node_modules/es-abstract/index.js

@@ -7,6 +7,7 @@ var ES2015 = require('./es2015');
 var ES2016 = require('./es2016');
 var ES2017 = require('./es2017');
 var ES2018 = require('./es2018');
+var ES2019 = require('./es2019');
 
 var ES = {
 	ES5: ES5,
@@ -15,7 +16,8 @@ var ES = {
 	ES7: ES2016,
 	ES2016: ES2016,
 	ES2017: ES2017,
-	ES2018: ES2018
+	ES2018: ES2018,
+	ES2019: ES2019
 };
 assign(ES, ES5);
 delete ES.CheckObjectCoercible; // renamed in ES6 to RequireObjectCoercible